title: Deletion of cgR_1596 and cgR_2070, encoding NlpC/P60 proteins, causes a defect in cell separation in Corynebacterium glutamicum R.
abstract: In previous work, random genome deletion mutants of Corynebacterium glutamicum R were generated using the insertion sequence (IS) element IS31831 and the Cre/loxP excision system. One of these mutants, C. glutamicum strain RD41, resulting from the deletion of a 10.1-kb genomic region (DeltacgR_1595 through cgR_1604) from the WT strain, showed cell elongation, and several lines appeared on the cell surface (bamboo shape). The morphological changes were suppressed by overexpression of cgR_1596. Single disruption of cgR_1596 in WT C. glutamicum R resulted in morphological changes similar to those observed in the RD41 strain. CgR_1596 has a predicted secretion signal peptide in the amino-terminal region and a predicted NlpC/P60 domain, which is conserved in cell wall hydrolases, in the carboxyl-terminal region. In C. glutamicum R, CgR_0802, CgR_1596, CgR_2069, and CgR_2070 have the NlpC/P60 domain; however, only simultaneous disruption of cgR_1596 and cgR_2070, and not cgR_2070 single disruption, resulted in cell growth delay and more severe morphological changes than disruption of cgR_1596. Transmission electron microscopy revealed multiple septa within individual cells of cgR_1596 single and cgR_1596-cgR_2070 double disruptants. Taken together, these results suggest that cgR_1596 and cgR_2070 are involved in cell separation and cell growth in C. glutamicum.
authors.affiliation: Research Institute of Innovative Technology for the Earth, Kizugawa, Kyoto 619-0292, Japan.
authors.forename: Yota
authors.initials: Y
authors.lastname: Tsuge
authors.forename: Hidetaka
authors.initials: H
authors.lastname: Ogino
authors.forename: Haruhiko
authors.initials: H
authors.lastname: Teramoto
authors.forename: Masayuki
authors.initials: M
authors.lastname: Inui
authors.forename: Hideaki
authors.initials: H
authors.lastname: Yukawa
mesh_terms: D001426:Bacterial Proteins / Q000235:genetics / Q000378:metabolism*; D002473:Cell Wall / Q000378:metabolism; D048230:Corynebacterium glutamicum / Q000187:drug effects / Q000235:genetics / Q000254:growth & development* / Q000378:metabolism; D004269:DNA, Bacterial / Q000235:genetics; D017353:Gene Deletion; D005798:Genes, Bacterial; D005816:Genetic Complementation Test; D006867:Hydrolases / Q000235:genetics / Q000378:metabolism*; D008826:Microbial Sensitivity Tests; D046529:Microscopy, Electron, Transmission; D009154:Mutation; D010957:Plasmids; D021382:Protein Sorting Signals; D014169:Transformation, Bacterial; D047090:beta-Lactams / Q000494:pharmacology
chemical_list: D001426:Bacterial Proteins; D004269:DNA, Bacterial; D021382:Protein Sorting Signals; D047090:beta-Lactams; D006867:Hydrolases